, there have been more than 300 drone strikes in the last decade, killing thousands of al qaeda and taliban, but more than 300 civilians, as well. a world away in remote villages, you can hear them. like a distant muted chain saw. a dull but deadly roar. villagers describing it this way. the drones are all over my brain. i can't sleep. when they're hovering over us, we're all scared. a reality we seldom see says stanley mcchrystal, the retired general who once ran the military's drone strike program. >> if the threshold gets too low and we're too casual about it, then we'll forget how much scar tissue we have built up in those countries. >> reporter: general mcchrystal believes americans should have the chance to know about these secret drone wars to weigh the benefits and risks. they will have that opportunity when john brennan speaks. martha raddatz, abc news, jerusalem. >> one of the more interesting things in our post 9/11 world. we've seen this debate before, whether it was waterboarding and torture, whether it was abu ghraib, about how far are we willing to go to protect ourselves, if